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Finding the Fourth Proportional to 479.01, 717.79 and 218.86

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Solution

The fourth proportional to 479.01, 717.79 and 218.86 is: 327.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.01 : 717.79 = 218.86 : x
  2. Step 2: Convert to fraction form
    479.01/717.79 = 218.86/x
  3. Step 3: Cross multiply
    479.01x = 717.79 × 218.86
  4. Step 4: Simplify right side
    479.01x = 157,095.52
  5. Step 5: Solve for x
    x = 157,095.52/479.01
  6. Step 6: Final answer
    x = 327.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.